Lice Detection and Feed control System.ppt

Monitoring of health and feed of farmed fish is very vital for the Fish Farming Community.

1. Lice Detection and
Feed control System
www.garwarefibres.com

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Sonar is based on the principle ofreflection of Ultrasonic Sound waves.
Ultrasonic sound waves are high frequency waves with frequency over 20Khz
upto 100 Khzwith a typical wavelength of 1.5 m–1.5 cm. They can give an
accuracy ofless than a cm. The distance to an object can be calculated using
this time difference and the speed of sound in the water (approximately 1,500
meters per second).
a. SONAR PRINCIPLE :
The SONAR transmitter in the Ship sends the ultrasonic sound waves towards
the sea bed from where they get reflected.
b. SONAR APPLICATIONS : Develop nautical charts, locate underwater hazards
to navigation, search for and map objects on the seafloor such as shipwrecks,
and map the seafloor itself
1. SONAR SYSTEM:
Lice Detection and Feed control System

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1. SONAR SYSTEM:
Lice Detection and Feed control System
c. Types of SONAR: Active and Passive.
PASSIVE SONAR:
Passive sonar is a listening device only; sound waves produced by another source
are received and changed into electrical signals for display on a monitor.
ACTIVE SONAR:
Active sonar sends out sound waves in pulses; time taken for the pulses to travel
through the water, reflect off of an object, and return to the ship can be measured.
Since the sound travels faster through water, they can easily calculate the distance
of the object.

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1. SONAR SYSTEM:
Lice Detection and Feed control System
ACTIVE SONAR:
Active sonar sends out sound waves in pulses; time taken for the pulses to travel
through the water, reflect off of an object, and return to the ship can be measured.
Since the sound travels faster through water, they can easily calculate the distance
of the object.
Multi-beam, side scan, split-beam, sub-bottom profiling, and synthetic
aperture sonarare all examples of active sonar systems.

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Lice Detection and Feed control System
BIOMASS ESTIMATION:
Detection of fish, and other marine and aquatic life, and estimation of their
individual sizes or total biomass using active sonar techniques.
As the sound pulse travels through water it encounters objects that are of
different density or acoustic characteristics than the surrounding medium,
such as fish, that reflect sound back toward the sound source.
These echoes provide information on fish size, location, abundance and
behavior. Data is usually processed and analysed using a variety of
software such asEchoview.

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FEEDING SYSTEM

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Lice Detection and Feed control System
LICE DETECTION:
Detection of Lice can be done by using the principle of Thermal Imaging.
Thermal imaging is simply the process ofconverting infrared (IR)
radiation (heat) into visible images that depict the spatial distribution
of temperature differences in a scene of any object viewed by a
thermal camera.
It’s an effective form of night-vision technology, with the capability to work in
the total absence of any light (since it doesn’t rely on visible light), and can
even work in smoke, fog, smog and haze.
Infrared energy has a wavelength starting at approximately 700 nanometers
and extends to approximately 1mm.

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Lice Detection and Feed control System
Thermal Imaging Processes:
The most common types areInSb, InGaAs, HgCdTe, QWIP FPA. The newest
technologies use low-cost, uncooledMicrobolometersas FPA sensors. Their
resolution is considerably lower than that of optical cameras, mostly 160x120 or
320x240Pixels , up to resolution of 1280 x 1024for the most expensive models.
Price of the Thermal Camera starts from 65K. FLIR TG 267 Single-spot IR
thermometers with a 160 ×120 (19, 200 pixels) true thermal imager

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LiDAR, or light detection and ranging, is a popular remote
sensing method used formeasuring the exact distance
of an object on the earth's surface.
LiDAR uses a pulsed laser to calculate an object’s variable distances
from the earth surface. These light pulses —put together with the
information collected by the airborne system —generate accurate 3D
information about the earth surface and the target object.
There are three primary components of a LiDAR instrument —the
scanner, laser and GPS receiver

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LiDARis a remote sensing technology. LiDAR technology uses
the pulse from a laser to collect measurements. These are
used to create 3D models and maps of objects and
environments.
A LiDAR system calculates
how long it takes for beams
of light to hit an object or
surface and reflect back to
the laser scanner. The
distance is then calculated
using the velocity of light

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How Does LiDAR Work?
LiDAR follows a simple principle —throw laser light at an object on
the earth surface and calculate the time it takes to return to the
LiDAR source. Given the speed at which the light travels
(approximately 186,000 miles per second), the process of measuring
the exact distance through LiDAR appears to be incredibly fast.

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A lidar determines the distance of an object or a surface

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Thank You!!
NG Team,
R&D Dept.